JP2012056190A - Adapter for drill bit and screw brush bit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adapter for a drill bit that can reduce a work burden of boring and a working cost.SOLUTION: The adapter for the drill bit 20 includes: a connecting outer shaft 8 attached to a drill chuck 14 of an electric drill 13; a plurality of drill chucks 5a, 5b for mounting a drill bit 12 and a screw brush bit 11; a chuck base 1 for rotatably and reversibly holding the plurality of drill chucks 5a, 5b; and a plurality of connecting inner shafts 7a, 7b attached to the chuck base 1 corresponding to the plurality of drill chucks 5a, 5b.

Description

  Embodiments of the present invention relate to, for example, an adapter for mounting a plurality of types of drill bits to a drill chuck in a replaceable manner, and a spiral brush bit.

  For example, when an adhesive anchor is driven into the ceiling of a building, an impact drill is used to make an anchor driving hole on the surface of the concrete frame. At this time, generally, a hole making process, a suction or blower process, a brushing process, and a suction or blower process are performed again.

  First, in the drilling process, a hole is drilled in the wall of the ceiling using an impact drill equipped with a drill bit. Thereafter, in the suction or blower process, the dust remaining in the hole is removed using a dust collector or a dropper, and in the brushing process, dust on the hole wall is removed using a brush. Finally, the inside of the hole is cleaned using a dropper or a dust collector.

  Thus, the effectiveness of the adhesive anchor can be improved by cleaning the inside of the anchor driving hole.

JP-A-9-295285

  However, as mentioned above, when drilling a hole for anchor driving, in addition to the impact drill, many tools such as a dust collector, a dropper, and a brush are required, and the operator often changes the tool, which takes time and labor. The management of the tools was troublesome, which caused the work cost to increase.

  Also, as described above, when drilling a hole for anchor driving, an operator with an impact drill drills a hole in the ceiling using a stepladder, descends the stepladder, places the impact drill on the floor, and drills with a dust collector or a syringe. It was necessary to remove the chips and brushing the inside, and the burden on the workers was great. In particular, as the number of holes increased, the number of steps to climb up and down the stepladder increased, resulting in heavy labor.

  Therefore, it is desired to develop a drilling tool that can reduce the work burden for drilling and reduce the work cost.

  The adapter for a drill bit according to the embodiment includes a connecting outer shaft attached to a drill chuck of an electric drill, a plurality of drill chucks for attaching a drill bit and a spiral brush bit, and the plurality of drill chucks held rotatably and reversibly. A chuck base and a plurality of coupled inner shafts attached to the chuck base corresponding to the plurality of drill chucks.

FIG. 1 is a schematic diagram illustrating an electric drill including an adapter for a drill bit according to an embodiment. FIG. 2 is a schematic view showing a state in which a spiral brush bit attached to the adapter of FIG. 1 is inverted by 180 °. FIG. 3 is an operation explanatory diagram for explaining an operation of inverting the spiral brush bit of FIG. 2 by 180 °. FIG. 4 is a schematic view showing a state in which the drill bit attached to the adapter of FIG. 1 is removed from the drive shaft of the electric drill. FIG. 5 is a schematic view showing a state in which the chuck base is rotated 180 degrees from the state of FIG. FIG. 6 is an operation explanatory diagram for explaining the operation of rotating the chuck base of FIG. FIG. 7 is a view for explaining the function of the spiral brush bit attached to the adapter of FIG.

Hereinafter, embodiments will be described in detail with reference to the drawings.
FIG. 1 shows a schematic diagram of an adapter 20 for exchanging and simultaneously mounting a plurality of types of drill bits 12 (or spiral brush bits 11) to a general-purpose drill, and an electric drill 13 to which the adapter 20 is mounted. It is.

  In the present embodiment, an example will be described in which the drill bit 12 is attached to one drill chuck 5a of the adapter 20 and the spiral brush bit 11 is attached to the other drill chuck 5b. A drill bit 12 may be attached to each drill chuck 5a, 5b. Moreover, although the adapter 20 which can attach two drill bits 12 (or spiral brush bit 11) was illustrated in this embodiment, the adapter which can attach three or more bits may be sufficient.

  The adapter 20 of the present embodiment has a connecting outer shaft 8 that is detachably attached to the drill chuck 14 of the electric drill 13. A female spline coupling 9 extending in the axial direction is provided on the inner peripheral surface of the connecting outer shaft 8. The connecting outer shaft 8 is for transmitting the driving force of the electric drill 13 to the adapter 20.

The adapter 20 has a chuck base 1 (see FIG. 6) to which two drill chucks 5a and 5b are attached so as to be rotatable and reversible.
That is, the chuck base 1 is attached to the elongated support rotary shaft 2 fixed to the electric drill 13 with two fixing belts 10 so as to be rotatable in the direction indicated by the arrow in FIG. It is slidably attached in the axial direction indicated by the arrow in FIG. For this reason, the two drill chucks 5a and 5b attached to the chuck base 1 can rotate 180 ° between the state shown in FIG. 4 and the state shown in FIG. 5, for example.

  Further, the chuck base 1 has a structure in which the two drill chucks 5a and 5b can be turned 180 ° as shown in FIG. FIG. 3 shows an operation explanatory diagram for explaining the operation of reversing the drill chuck 5b to which the spiral brush bit 11 is attached by 180 °, but the drill chuck 5a to which the drill bit 12 is attached is similarly inverted by 180 °. It is possible. For this reason, the drill bit 12 attached to one drill chuck 5a can be inverted 180 ° from the state shown in FIG. 5, and the spiral brush bit 11 attached to the other drill chuck 5b is also shown in FIG. The state shown can be inverted 180 ° from the state shown in FIG.

  Further, the chuck base 1 includes connecting inner shafts 7a and 7b corresponding to the drill chucks 5a and 5b. Each connecting inner shaft 7a, 7b is provided coaxially with the corresponding drill chuck 5a, 5b. These connecting inner shafts 7a and 7b are selectively inserted inside the above-described connecting outer shaft 8 when the corresponding drill chuck 5a is connected to the electric drill 13. That is, male spline couplings (not shown) that mesh with female spline couplings 9 provided on the inner peripheral surface of the connecting outer shaft 8 are provided on the outer peripheral surfaces of these connecting inner shafts 7a and 7b. .

  For example, as shown in FIG. 1, when a connecting inner shaft 7a provided corresponding to one drill chuck 5a is inserted and arranged inside the connecting outer shaft 8, the rotating shaft of the electric drill 13 and the drill chuck 5a are mounted. The drill bits 12 are connected coaxially. In this state, the rotation of the electric drill 13 can be transmitted to the drill bit 12 by the action of the male / female spline coupling.

  In order to make it possible to attach the adapter 20 having the above structure to a plurality of types of electric drills 13 having different sizes in general, most of the support rotating shaft 2 is a flexible arm 4 that can be bent freely. That is, since the distance 15 (see FIG. 4) between the drive shaft and the outer peripheral surface of the electric drill 13 varies depending on the size of the electric drill 13, the flexible arm 4 is adopted so that the difference in size can be absorbed. did.

  Hereinafter, the operation | movement which opens the hole for an adhesive anchor in a concrete frame using the electric drill 13 which attached the drill bit 12 and the spiral brush bit 11 using the adapter 20 mentioned above is demonstrated.

  First, as shown in FIG. 1, as a preparation for drilling, a drill bit 12 is attached to one drill chuck 5a and a spiral brush bit 11 is attached to the other drill chuck 5b. At this time, one drill chuck 5 a is connected to the drive shaft of the electric drill 13. The bit is attached in a state where the two drill chucks 5a and 5b of the chuck base 1 are arranged in the posture shown in FIG. The drill chucks 5 a and 5 b of the adapter 20 function in the same manner as the drill chuck 14 of the electric drill 13.

  First, the drill chuck 5b to which the spiral brush bit 11 that is not used for drilling is attached is inverted 180 ° to the posture shown in FIG. At this time, the spiral brush bit 11 is rotated 180 ° with respect to the chuck base 1 as shown in FIG. More specifically, the drill chuck 5b on which the spiral brush bit 11 is mounted is rotated by 180 ° in a direction in which the spiral brush bit 11 does not collide with the peripheral member, that is, about a rotation axis extending vertically in FIG.

  In this state, the electric drill 13 is operated, the drill bit 12 is rotated, and a hole is made in the concrete frame. At this time, since the spiral brush bit 11 is inverted as shown in FIG. 2, the spiral brush bit 11 does not obstruct the drilling.

  After drilling, in order to use the spiral brush bit 11, the drill chuck 5 b is inverted 180 ° from the posture shown in FIG. 2 and temporarily returned to the posture shown in FIG. 1. Thereafter, in order to rotate the chuck base 1 by 180 °, the chuck base 1 is moved in the direction away from the electric drill 13 along the drive shaft of the electric drill 13 as shown in FIG. The connecting inner shaft 7 a on the chuck base 1 side is pulled out from the connecting outer shaft 8 fixed to the drill chuck 14. In this state, the chuck base 1 can freely rotate with respect to the support rotation shaft 2.

  That is, the support rotary shaft 2 is provided with a margin 16 that can completely pull out the connection inner shaft 7a (or 7b) from the connection outer shaft 8. In other words, the support rotating shaft 2 is fixedly provided with two stoppers 3a and 3b for defining a slide range that allows the chuck base 1 to slide slightly beyond the margin 16.

  The stopper 3a on the front end side of the support rotary shaft 2 is provided to prevent the chuck base 1 from dropping from the support rotary shaft 2 when the chuck base 1 is pulled out from the state of FIG. 1 to the state of FIG. ing. The other stopper 3b defines the pushing position of the chuck base 1.

After the chuck base 1 is pulled away from the electric drill 13 as shown in FIG.
As shown in FIG. 6, the chuck base 1 is rotated 180 degrees and arranged in the state shown in FIG. Further, after that, the chuck base 1 is pushed toward the electric drill 13, the inner connecting shaft 7 b on the spiral brush bit 11 side is inserted and arranged inside the outer connecting shaft 8 fixed to the electric drill 13, and the spiral brush bit 11. Is connected to the electric drill 13.

  This time, the drill chuck 5a to which the drill bit 12 that is not used for brushing is attached is inverted 180 °. In this state, the electric drill 13 is operated to insert the spiral brush bit 11 into the hole drilled in the housing, and the chips and dust remaining in the hole are removed by the rotation of the spiral brush bit 11.

  As shown in FIG. 7, the spiral brush bit 11 has hairs arranged in a spiral shape. For this reason, when the spiral drill bit 11 is put in the hole and the electric drill 13 is operated, the concrete chips and dust in the hole are scraped out. In other words, the bristles of the spiral brush bit 11 are provided with a spiral in a direction in which chips and dust can be scraped from the hole when the spiral brush bit 11 is rotated in a predetermined direction.

  The spiral brush bit 11 according to the present embodiment performs a blower process, a brushing process, and a second blower process for removing chips in the hole after a hole is formed by a single process. In other words, when the configuration of the present embodiment is adopted, a dust collector or a syringe for the blower process becomes unnecessary.

  As described above, according to the present embodiment, since only the electric drill 13 with the adapter 20 is used for drilling, there is no need to change tools as in the prior art, and workability can be improved. Moreover, according to this embodiment, management of tools for drilling is also facilitated.

  In addition, when switching between the drill bit 12 and the spiral brush bit 11, the operator rotates the chuck base 1 by hand, or reverses the drill chuck 5a, 5b by hand. The bit 11 is not directly touched with a hand, and a defect such as a burn can be prevented.

  That is, according to the present embodiment, the workability related to the drilling operation can be improved, and the operation cost can be reduced.

  Although the embodiment of the present invention has been described, the above-described embodiment is presented as an example, and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Chuck base, 2 ... Support rotating shaft, 3a, 3b ... Stopper, 4 ... Flexible arm, 5a, 5b ... Drill chuck, 7a, 7b ... Connection inner shaft, 8 ... Connection outer shaft, 9 ... Spline coupling, 10 ... fixed belt, 11 ... spiral brush bit, 12 ... drill bit, 13 ... electric drill, 14 ... drill chuck, 20 ... adapter.

Claims (5)

An adapter for mounting a plurality of drill bits to the drill body in an exchangeable manner,
A first connecting shaft attached to the drive shaft of the drill body;
A plurality of drill chucks for respectively mounting the plurality of drill bits;
A chuck base holding the plurality of drill chucks in a state where each drill bit can be arranged coaxially with respect to the first connecting shaft in the middle of rotation and each drill bit can be reversed in the reverse direction;
A support rotary shaft that rotatably supports the chuck base and is attached to the drill body;
A plurality of second bits attached to the chuck base corresponding to the plurality of drill chucks to connect the drill bit arranged coaxially to the first connection shaft by the rotation of the chuck base to the first connection shaft. A connecting shaft;
Having an adapter.   The adapter according to claim 1, wherein the first and second connecting shafts have a spline coupling structure that slides in the axial direction and meshes with each other.   The adapter according to claim 2, wherein the support rotation shaft supports the chuck base so as to be slidable in the axial direction in order to enable connection and release of the first and second connection shafts.   The adapter according to claim 3, wherein the support rotation shaft has a flexible arm structure so that a distance between the support rotation shaft and the drive shaft of the drill body can be changed.   A helical brush bit having helical bristles attached to one of the drill chucks of the adapter of claim 1 in place of the drill bit.

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